EP 2233990 A4 20120104 - AN ELECTRO-HYDRAULIC PROPORTIONAL FLOW VALVE SPEED REGULATING CONTROL SYSTEM AND ITS METHOD
Title (en)
AN ELECTRO-HYDRAULIC PROPORTIONAL FLOW VALVE SPEED REGULATING CONTROL SYSTEM AND ITS METHOD
Title (de)
ELEKTROHYDRAULISCHES PROPORTIONAL-FLUSSVENTIL-GESCHWINDIGKEITSREGELUNGS-STEUERSYSTEM UND VERFAHREN DAFÜR
Title (fr)
SYSTÈME ET PROCÉDÉ DE COMMANDE ET DE RÉGULATION DE LA VITESSE D'UNE ÉLECTROVANNE HYDRAULIQUE À DÉBIT PROPORTIONNEL
Publication
Application
Priority
- CN 2008073091 W 20081117
- CN 200710168189 A 20071128
Abstract (en)
[origin: EP2233990A1] An electro-hydraulic proportional flow valve speed regulating control system includes a PWM regulating device, an electro-hydraulic proportional flow valve, a hydraulic executing element, a speed measuring module, an electro-hydraulic proportional flow valve characteristic measuring module, and a feedforward control module. The speed measuring module measures a speed of the hydraulic executing element and sends the measured result to the electro-hydraulic proportional flow valve characteristic measuring module which measures a minimum actuating current and a maximum actuating current of the electro-hydraulic proportional flow valve and a maximum speed of the hydraulic executing element and inputs these measured results to the feedforward control module. With these measured results, the feedforward control module establishes a corresponding relationship between the speed of the hydraulic executing element and the valve core current and inputs the valve core current in correspondence with the setting speed value to the PWM regulating device, thereby driving the electro-hydraulic proportional flow valve.
IPC 8 full level
F15B 11/04 (2006.01); F15B 13/044 (2006.01); F15B 13/16 (2006.01); F15B 19/00 (2006.01); G05B 6/02 (2006.01); G05B 11/28 (2006.01); G05B 13/04 (2006.01); G05D 7/06 (2006.01)
CPC (source: EP US)
F15B 19/002 (2013.01 - EP US); G05B 11/28 (2013.01 - EP US); G05B 13/042 (2013.01 - EP US); G05D 7/0635 (2013.01 - EP US); G05B 2219/41432 (2013.01 - EP US); G05B 2219/41435 (2013.01 - EP US); G05B 2219/42065 (2013.01 - EP US)
Citation (search report)
- [I] US 2002134956 A1 20020926 - SMITH JAMES CRAIG [US], et al
- [A] EP 0393650 A2 19901024 - VICKERS INC [US]
- See references of WO 2009067938A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2233990 A1 20100929; EP 2233990 A4 20120104; CN 100564898 C 20091202; CN 101169141 A 20080430; KR 101167281 B1 20120723; KR 20100115734 A 20101028; RU 2010124833 A 20120110; RU 2446428 C2 20120327; US 2011024654 A1 20110203; WO 2009067938 A1 20090604
DOCDB simple family (application)
EP 08854527 A 20081117; CN 200710168189 A 20071128; CN 2008073091 W 20081117; KR 20107014359 A 20081117; RU 2010124833 A 20081117; US 74492908 A 20081117